National Instruments NI-9218 Channel Analogue Input Module

Iinkcukacha

• Igama leMveliso: NI-9218
• Iindidi zokudibanisa: I-LEMO kunye ne-DSUB
• Iindidi zokulinganisa: Inkxaso eyakhelwe-ngaphakathi kwiindidi ezahlukeneyo
• Uchulumanco lweSensor: Optional 12V excitation

Iintlobo zesiqhagamshelo

I-NI-9218 inodidi olungaphezulu kweyodwa yokudibanisa: i-NI-9218 ene-LEMO kunye ne-NI-9218 ene-DSUB. Ngaphandle kokuba uhlobo lomdibaniso luchaziwe, i-NI-9218 ibhekisa kuzo zombini iindidi zesihlanganisi.
NI-9218 Pinout

Signals by Measurement Type

Imowudi	Iphini 1
	1	2	3	4	5	6	7	8	9	10
±16 V	EX+	—	AI-, EX-	—	—	I-AI+	—	—	—	—
±65 mV	EX+ 2 [2]	—	EX- [2]	—	—	I-AI+	AI- 3	—	—	—
Ngokupheleleyo- Ibhulorho	EX+ [2]	—	EX- [2]	RS+	RS-	I-AI+	AI-	SC	SC	—
IEPE	—	I-AI+	AI-	—	—	—	—	—	—	—
I-TEDS	—	T+ 4	T-	—	—	—	—	—	—	T+ 5

IiNkcazo zeMiqondiso

Umqondiso	Inkcazo
I-AI+	Positive analogue input signal connection
AI-	Negative analogue input signal connection
EX+	Positive sensor excitation connection
EX-	Negative sensor excitation connection
RS+	Positive remote sensing connection
RS-	Negative remote sensing connection
SC	Shunt calibration connection
T+	TEDS data connection
T-	TEDS return connection

Iintlobo zoMlinganiso

I-NI-9218 ibonelela ngenkxaso eyakhelwe-ngaphakathi kwezi ntlobo zokulinganisa zilandelayo.

• ±16 V
• ±65 mV
• Full-Bridge
• IEPE
•  NI-9218 with LEMO only.
•  Optional sensor excitation.
• Tie to pin 3.
• TEDS Class 1 data connection.
•  TEDS Class 2 data connection.

Ingcebiso NI recommends using the NI-9982 screw-terminal adapter when using built-in measurement types on the NI-9218.

I-NI-9218 inikezela ngenkxaso eyongezelelweyo kwezi ntlobo zokulinganisa zilandelayo xa usebenzisa i-adapter ethile yokulinganisa.

• ±20 mA, requires the NI-9983
• ±60 V, requires the NI-9987
• Half-Bridge requires the NI-9986
• Quarter-Bridge requires the NI-9984 (120 Ω) or NI-9985 (350 Ω)

±16 V Uqhagamshelo

I-NI-9218 inikeza ukhetho lwe-12 V ye-sensor excitation. Ukusebenzisa i-excitation ye-12 V, qhagamshela i-9 VDC kwi-30 ye-VDC unikezelo lwamandla kwi-Vsup, qhagamshela ii-terminals zokuvuselela kwi-sensor yakho kwi-EX + / EX-, kwaye unike amandla i-12 V kwi-software yakho.

Isalathiso esiyeleleneyo:

• NI-9982 ±16 V iPinothi yoQhagamshelwano

± 65 mV Uqhagamshelwano

• You must connect AI to EX- on the NI-9218.
• I-NI-9218 inikeza ukhetho lwe-12 V ye-sensor excitation. Ukusebenzisa i-excitation ye-12 V, qhagamshela i-9 VDC kwi-30 ye-VDC unikezelo lwamandla kwi-Vsup, qhagamshela ii-terminals zokuvuselela kwi-sensor yakho kwi-EX + / EX-, kwaye unike amandla i-12 V kwi-software yakho.

Related reference

• NI-9982 ± 65 mV iPinout yoQhagamshelwano

Uqhagamshelo lweBridge epheleleyo

• The NI-9218 provides 2 V excitation to loads ≥120 Ω or 3.3 V excitation to loads ≥350 Ω.
• The NI-9218 provides optional connections for remote sensing (RS) and shunt calibration (SC). Remote sensing corrects for errors in excitation leads, and shunt calibration corrects for errors caused by resistance within one leg of the bridge.

Isalathiso esiyeleleneyo:

• I-NI-9982 iPinout yoQhagamshelwano lweBridge epheleleyo

IEPE Connections

• The NI-9218 provides an excitation current for each channel that powers IEPE sensors.
• AI+ provides DC excitation, and AI- provides the excitation return path.

Isalathiso esiyeleleneyo:

• NI-9982 IEPE Connection Pinout

±20 mA Uqhagamshelwano

• Connecting ±20 mA signals requires the NI-9983.
• I-NI-9218 inikeza ukhetho lwe-12 V ye-sensor excitation. Ukusebenzisa i-excitation ye-12 V, qhagamshela i-9 VDC kwi-30 ye-VDC unikezelo lwamandla kwi-Vsup, qhagamshela ii-terminals zokuvuselela kwi-sensor yakho kwi-EX + / EX-, kwaye unike amandla i-12 V kwi-software yakho.

Connecting a loop-powered 2-wire or 3-wire transducer requires adding a 20 kΩ resistor between AI- and Ex-.

Isalathiso esiyeleleneyo:

• NI-9983 Pinout

±60 V Uqhagamshelo

Connecting ±60 V signals requires the NI-9987.
Isalathiso esiyeleleneyo:

• NI-9987 Pinout

Uqhagamshelwano lweHalf-Bridge

• Connecting half bridges requires the NI-9986.
• The NI-9218 provides 2 V excitation to half bridges of ≥240 Ω total or 3.3 V excitation to half bridges of ≥700 Ω total.
• The NI-9218 provides optional connections for remote sensing (RS) and shunt calibration (SC). Remote sensing corrects for errors in excitation leads, and shunt calibration corrects for errors caused by resistance within one leg of the bridge.

Isalathiso esiyeleleneyo:

• NI-9986 Pinout

UQhagamshelwano lweQuarter-Bridge

• Connecting 120 Ω quarter bridges requires the NI-9984.
• Connecting 350 Ω quarter bridges requires the NI-9985.

Ingcebiso NI-recommends 2 V excitation when using a NI-9984 with 120 Ω quarter bridges and 3.3 V excitation when using the NI-9985 with 350 Ω quarter bridges.

Isalathiso esiyeleleneyo:

• NI-9984/9985 Pinout

TEDS Connections

For more information about TEDS, visit ni.com/info and enter the Info Code rdteds.

Inkxaso yeTEDS

• I-TEDS Class 1 sensors ibonelela nge-interface yokudlulisa ulwazi kwi-sensors. I-NI-9218 ene-LEMO, i-NI-9218 ene-DSUB, i-NI-9982L, i-NI-9982D, i-NI-9982F isekela i-TEDS Class 1 sensors.
• TEDS Class 2 sensors provide an interface for transferring information from TEDS-enabled sensors. The NI-9218 with LEMO, NI-9982L, NI-9983L, NI-9984L, NI-9985L, and NI-9986L support TEDS Class 2 sensors.
  

  Vsup Daisy Chain Topology

I-NI-9218 ene-LEMO ibonelela ngezikhonkwane ezine kwi-Vsup isinxibelelanisi se-daisy chaining.
I-NI-9218 Imigaqo yoQhagamshelwano

Make sure that the devices you connect to the NI-9218 are compatible with the module specifications.

IziKhokelo zokuQhubela iintambo zesiko

• Qaphela ezi zikhokelo zilandelayo xa usebenzisa i-NI-9988 i-adapter yokudibanisa indebe ye-solder okanye i-LEMO crimp connector (784162-01) ukwenza iintambo eziqhelekileyo.
• Use a shielded cable for all signals.
• Connect the cable shield to the earth ground.
• Use twisted-pair wiring for the AI+/AI- and RS+/RS- signals to achieve specified EMC performance.

I-NI-9218 Block Diagram

• Two 24-bit analogue-to-digital converters (ADCs) simultaneously sample mijelo yomibini ye-AI.
• The NI-9218 provides channel-to-channel isolation.
• The NI-9218 reconfigures the signal conditioning for each measurement type.
• The NI-9218 provides excitation for IEPE and bridge completion measurement types.
• The NI-9218 can provide optional 12 V sensor excitation for ±16 V, ±65 mV, and ±20 mA measurement types.

±16 V kunye ne-±65 mV iMiqondiso yoMqondiso

Iimpawu zongeniso kwitshaneli nganye zigcinwe zikhuselekile, zibekwe kwimeko, kwaye emva koko sampikhokelwa yi-ADC.

Umgangatho woMqondiso weBridge epheleleyo

• The analogue input connections sense and then amplify the incoming analogue signal.
• The excitation connections provide differential bridge-excitation voltage.
• Remote sensing continuously and automatically corrects for lead-wire induced excitation voltage loss when using the RS connections.
• Shunt calibration can be used to correct for lead-wire-induced desensitisation of the bridge.

IEPE Signal Conditioning

• The incoming analogue signal is referenced to an isolated ground.
• Each channel is configured for AC coupling with an IEPE current.
• Each channel provides a TEDS Class 1 interface.

±20 mA ukuLungiswa koMqondiso

The NI-9983 provides a current shunt for the incoming analogue signal.

±60 V iMeko yoMqondiso

The NI-9987 provides an attenuator for the incoming analogue signal.

iHalf-Bridge Signal Conditioning

• The NI-9886 provides half-bridge completion resistors for the incoming analogue signal.
• You must connect AI+, EX+, and EX-.
• RS+ and RS- connections are optional.
• You do not need to connect the AI signal because it is connected internally.

ULungiselelo lweNdlela yeQuarter-Bridge

The NI-9984 and NI-9985 provide a quarter-bridge completion resistor and a half-bridge completion resistor.
Ukuhluza
The NI-9218 uses a combination of analogue and digital filtering to provide an accurate representation of in-band signals while rejecting out-of-band signals. The filters discriminate between signals based on the frequency range, or bandwidth, of the signal. The three important bandwidths to consider are the passband, the stopband, and the alias-free bandwidth.
I-NI-9218 imele izibonakaliso ngaphakathi kwe-passband, njengoko ilinganiswe ngokuyinhloko nge-passband ripple kunye nesigaba sokungahambelani. Zonke izibonakaliso ezibonakala kwi-alias-free bandwidth zingaba zizibonakaliso ezingabonakaliyo okanye iimpawu eziye zahluzwa ubuncinane ubungakanani be-stopband rejection.

Inombolo yokupasa

Iimpawu ezingaphakathi kwebhendi yokugqitha zinenzuzo exhomekeke kumaza okanye ukuthotywa. Inani elincinci lokwahluka kwinzuzo ngokubhekiselele kwi-frequency libizwa ngokuba yi-passband flatness. Iifilitha zedijithali ze-NI-9218 zilungelelanisa uluhlu lokuphindaphinda kwe-passband ukuhambelana nezinga ledatha. Ke ngoko, isixa senzuzo okanye ukuthomalaliswa ngamaxesha athile kuxhomekeke kwireyithi yedatha.

Misa ibhande
Isihluzi sithomalalisa zonke iisignali ezingaphezulu kwe-stopband frequency. Eyona njongo yesihluzo kukuthintela ukuchaswa. Ke ngoko, isikali se-stopband frequency ngokuchanekileyo kunye nereyithi yedatha. Ukwaliwa kwe-stopband bubuncinane bexabiso lokuthomalalisa olusetyenziswa sisihluzo kuzo zonke iisignali ezinefrikhwensi ngaphakathi kwendawo yokumisa.

Isifaniso-Simahla Bandwidth
Any signal that appears in the alias-free bandwidth of the NI-9218 is not an aliased artefact of signals at a higher frequency. The alias-free bandwidth is defined by the ability of the filter to reject frequencies above the stopband frequency, and it is equal to the data rate minus the stopband frequency.

Ukuvula iAdapter yoMlinganiselo

Kwenziwe ntoni

• Unlock the measurement adapter housing/cover.
• Slide the measurement adapter housing/cover to access the screw terminals.

Ukunyuswa kwe-NI-998xD/998xL
Yintoni Enokusetyenziswa

• NI-998xD or NI-998xL Measurement Adapter
• M4 or Number 8 Screw
• I-Screwdriver

Kwenziwe ntoni

Mount the measurement adapter to a flat surface using the mounting hole on the measurement adapter and the screw.

I-Adaptha yoMlinganiso yokuQala

Izikhululo zomhlaba kwi-adapter yokulinganisa zixhunyiwe kumhlaba we-chassis xa i-adapter yokulinganisa ixhunyiwe kwi-NI-9218 kwaye i-NI-9218 ifakwe kwi-chassis.

Umlinganiselo we-Adapter Pinouts

La macandelo alandelayo abandakanya iipinouts ze-NI-9218 zokulinganisa i-adapters.

NI-9982 ±16 V iPinothi yoQhagamshelwano

Pins 3a and 3b are tied together on the NI-9982.
Isalathiso esiyeleleneyo:

• ±16 V Uqhagamshelo

NI-9982 ± 65 mV iPinout yoQhagamshelwano

Pins 3a and 3b are tied together on the NI-9982.

Isalathiso esiyeleleneyo:

• ± 65 mV Uqhagamshelwano

I-NI-9982 iPinout yoQhagamshelwano lweBridge epheleleyo

Pins 3a and 3b are tied together on the NI-9982.

Isalathiso esiyeleleneyo:

• Uqhagamshelo lweBridge epheleleyo

 

NI-9982 IEPE Connection Pinout

Pins 3a and 3b are tied together on the NI-9982.
Isalathiso esiyeleleneyo:

• IEPE Connections
  NI-9983 Pinout

Pins 3a and 3b are tied together on the NI-9983.
Isalathiso esiyeleleneyo:

• ±20 mA Uqhagamshelwano
  NI-9984/9985 Pinout

Isalathiso esiyeleleneyo:

• UQhagamshelwano lweQuarter-Bridge
  NI-9986 Pinout

Pins 3a and 3b are tied together on the NI-9986.
Isalathiso esiyeleleneyo:

• Uqhagamshelwano lweHalf-Bridge
  NI-9987 Pinout

Pins 3a and 3b are tied together on the NI-9987.
Isalathiso esiyeleleneyo:

• ±60 V Uqhagamshelo

FAQ

Amaxwebhu / Izibonelelo

Izixhobo zeSizwe ze-NI-9218 Imodyuli yokuNgena kwe-Analog yeChaneli [pdf] Incwadi Yomyalelo I-NI-9218 ene-LEMO, i-NI-9218 ene-DSUB, i-NI-9218 Imodyuli yokuNgena kwe-Analog ye-Channel, i-NI-9218, i-Modyuli yokuNgena kwe-Analog ye-Channel, i-Modyuli yokuNgena kwe-Analog, i-Modyuli yokufaka

Iimbekiselo

• Incwadi yokusebenzisa